Origin Insertion

Pec Minor O

Anterior surfaces anad superior margins of ribs 3-5 or 2-4 and the fascia covering the associated external intercostal muscles

Pec Minor I

Coracoid process of

scapula

Trapezius O

Occipital bone,

ligamentum nuchae,

and spinous process

of thoracic vertebrae

Trapezius I

Clavicle and scapula

(acromion and

scapular spine)

Levator Scapulae O

Transverse process

of first 4 cervical

vertebrae

Levator Scapulae I

Vertebral border of

scapula (near

superior angle and

medial end of

scapular spine)

Rhomboid Major and Minor O

Ma: Ligamentum

nuchae and spinous

process (T2-T5)

Mi: Spinous process

of C7-T1

Rhomboid Major and Minor I

Ma: vertebral border

of scapula from spine

to inferior angle

Mi: Vertebral border

of scapula

Serratus Anterior O

Anterior and superior

margins of ribs 1-10

Serratus Anterior I

Anterior surface of

vertebral border of

scapula

Subclavius O

First rib

Subclavius I

Clavicle (inferior

border of middle ⅓)

Pec Major O

Cartilages of ribs 2-6,

body of sternum, and

inferior, medial

portion of clavicle

Pec Major I

Crest of greater

tubercle and lateral

lip of bicipital groove

of humerus

Latissimus Dorsi O

Spinous process of

inferior thoracic and

all lumbar/sacral

vertebrae, ribs 8-12

and thoracolumbar

fascia

Latissimus Dorsi I

Floor of bicipital

groove of humerus

Deltoid O

Clavicle and scapula

(acromion and

adjacent scapular

spine)

Deltoid I

Deltoid tuberosity of

humerus

Teres Major O

Inferior angle of scpula

Teres Major I

Medial lip of bicipital groove

Subscapularis O

Subscapular fossa

Subscapularis I

Lesser tubercle

Supraspinatus O

Supraspinous fossa

Supraspinatus I

Greater tubercle

Infraspinatus O

Infraspinous fossa

Infrapinatus I

greater tubercle

Teres minor O

Lateral border of scapula

Teres Minor I

Greater tubercle

Coracobrachialis O

Coracoid Process

Coracobrachialis I

Medial margin of shaft of humerus

tricep brachii O

Lat: superior, lateral

margin of humerus

Long: infraglenoid

tub.

Med: posterior

surface of

humerus/inferior to

radial groove

tricep brachii I

Olecranon of ulna

Biceps Brachii O

L: Supraglenoid tub.

S: Coracoid proc.

Biceps Brachii I

Radial Tuberosity

Brachialis O

Distal ½ of anterior

surface of humerus

Brachialis I

Ulnar tub. /

coronoid process

Brachioradialis O

Proximal 2/3 of

lateral

supracondyle ridge

of humerus

Brachioradialis I

Lateral surface of distal end of radius

Anconeus O

Posterior surface of lateral epicondyle of humerus

Anconeus I

Lateral Margin of olecranon and ulnar shaft

Pronator Teres O

Medial epincondyle of humerus and coronoid process of ulna

Pronator teres I

Middle of lateral surface of radius

Supinator O

lateral epicondyle of humerus and ridge near radial notch of ulna

Supinator I

Anterolateral surface of radius, distal to radial tub.